n7000/3105 schem/BOM

[S20RVERT]

After reading Zilch's reply about building a charge coupled 3105, I would like to build one. Although I am an electrical powerplant senior designer (35 years) I only do cad design in the office...no field/hands-on work since high school. I can read a schematic but need all the nuts & bolts to try and build a crossover. I have my dad's soldering gun from the 50's and will give it a go. This is for a 3110(stock recapped by a JBL service center in Chicago last month)/2441(16ohm)-HL89/075(16ohm)/LE10(16ohm)-PR10 self-made center channel. Can anyone help me with a detailed schematic and bill-of-material? Thanks in advance, Kurt

[Zilch]

*Note: L1, L2 = 0.3 mH for 8 kHz

Parts Express B/M:

L1 = 255-234 Jantzen = $5.98
L2 = 255-040 Jantzen = $4.19
C1 - C4 = 027-542 Solen x 4 = $12.16
LP1 = 260-262 (3/8" shaft) or -265 (1" shaft) = 9.25
V1 = 140-205 UltraLife Lithium = $7.99
Battery Holder = 140-982 Metal = $2.45
Terminals = 091-1247 or Equiv = $6.91
R1, R2 = Radio Shack 1/4 W Metal Film x 2 = $1.05

Total = $49.98 Each

Deduct $2.42 for 8 kHz version....

[S20RVERT]

Zilch,
Thanks a bunch for the info. A couple more questions:
a. #16AWG CU stranded wire OK for wire size?
b. Does your schem work for a 16ohm UHF as well
as a 8ohm?

[Zilch]

a. 18 Ga. is fine, actually, and 20 Ga. on the UHF, even.

b. Ignore what impedance it says on them; they're all the same. Your UHF drivers are 8 Ohms, nominal. More like 10 Ohms actual, as I recall. Look in the Ring Radiator Comparisons thread where we measured a bunch of them....

[S20RVERT]

Thanks Zilch for the BOM. I ordered the parts and will give it try. I'll report how it comes out. Kurt

[S20RVERT]

Zilch,

I take it that if I want 9kHz I would use 0.15 mH for L1 & L2 and for 10kHz
I would use 0.075 mH. I see that on the '43 series monitors the 2405 is crossed-over above 9kHz and I'll buy for 7, 8, 9 & 10khz and listen for the best for me.

Thanks & Best Regards,

S20VERT